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LarryBaxter4-Participant
4-Participant
February 12, 2014
Question

Invalid Host error

  • February 12, 2014
  • 2 replies
  • 15907 views

Good morning. Sorry in advance about the noise, but...

I'm trying to reactivate MathCAD 14 on Win 7 after changing my User Account.

PTC reset my password, no help.

I start MathCAD, gat an error message "Invalid Host", "the host ID doesn't match the hostID specified in the license file" etc

I run the suggested MAthCAD license setup wizard, browse to Program Files/MathCAD 14/license.dat and open it. It says "Congratulations! MathCAD is now set up and ready to run!"

But it isn't; when I open MathCAD 14 again, I get the same "Invalid Host" message.

Any ideas?

...L

2 replies

M
MikeArmstrong1-Visitor
1-Visitor
February 12, 2014

Does the MAC address in the license file match your PC's MAC address?

L
LarryBaxter4-ParticipantAuthor
4-Participant
February 12, 2014

M,

>Does the MAC address in the license file match your PC's MAC address?

I don't know. I did not change the machine. How do I find the MAC address, and how do I get them to match?

...L

M
MikeArmstrong1-Visitor
1-Visitor
February 12, 2014

Locate you Mathcad license and make a copy (say on your desktop) and open using Notepad or other. You should see the MAC address the license is attached to in a format as below:

HOSTID=PTC_HOSTID=XX-XX-XX-XX-XX-XX

To locate your machines MAC address follow these instructions:

  • windows home button and type cmd in the search box
  • type cmd
  • type ipconfig/all

The MAC address of your machine will be shown under 'Physical address.

A start would be to check if they match.

W
Werner_E25-Diamond I
25-Diamond I
February 12, 2014

I'm trying to reactivate MathCAD 14 on Win 7 after changing my User Account.

Your user account at the PTC site has nothing to with the license (other than you have to create one to get the file during installation). "Reactivate on Win7" - does this mean that you also changed your hardware and are using a new machine? You have to know that the license file you get during installation is bound to the MAC address of a network interface card in your machine. So if you installed Mathcad on a different machine your license file is invalid and you would have to contact PTC support to get a new one --> http://www.ptc.com/support/mathcad_supportCenter.htm.

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